I'm going to make my SBS2003 sit in the recieving end of a SMTP store and forward chain. With my ISP using sendmail he'll collect all my mail in one place and then forward it directly to my server. Im opening port 25 in my router and pointing it at SBS2003 (1 nic no ISA) and I'm filtering IPs at the Virtual Server settings.
Before I do all this I'm testing my setup. I can use Outlook Express to send SMTP directly to the SBS inside the LAN though if I try connect from outside the LAN going via the router (using DYNDNS, and a "virtual server" port forward on port 25 on a D-Link 604 Router) it fails miserably all the time. Is there any hoops I must jump through to make this happen?
OE: Protokoll: SMTP, Port: 25, Secure (SSL): Nej, Socket-fel: 10053, Felnummer: 0x800CCC0F
Outlook 2003: with the "Test account"-feature I get ok on finding the server but an err on sending a testmail